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Patent Searching and Data


Title:
AUTOMATIC DOOR LATCH
Document Type and Number:
Japanese Patent JPH08100552
Kind Code:
A
Abstract:

To operate a release mechanism by a dead bolt by automatically operating the bolt when a partially extended bolt is brought into contact with a door strike installed to an extension post.

A bolt 20 has a series of grooves positioned at different height, and the involute end section of a wire 84 is moved by an inclined section, when the bolt is moved among three positions in these grooves. When the bolt is positioned at a fully extended place, a wire tip section 90 is positioned at the rear of the groove section 94, and the bolt is held at the place by a spring 26 pushing a swivel 22 in the counterclockwise direction. When a key is inserted into the swivel and rotated in the clockwise direction, the bolt is moved inward, and the wire tip section 90 is passed in the groove section 94 and lifted on the inclined section 96, and passed into a wall section 10 and entered into the groove section 98. The bolt is positioned at a fully retreated place, and the spring 26 moves the bolt to the outside, when the swivel is released. When the bolt is pushed and moved inwards, the wall section 104 enters the wire tip section 90 into the groove section 106, and the bolt is shifted to a fully extended place.


Inventors:
PETE KAJIYUKU
Application Number:
JP23959695A
Publication Date:
April 16, 1996
Filing Date:
September 19, 1995
Export Citation:
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Assignee:
MASTER LOCK CO
International Classes:
E05B53/00; E05B59/00; E05B55/14; E05B63/20; E05B65/06; E05B63/00; E05B65/10; (IPC1-7): E05B65/06; E05B55/14
Attorney, Agent or Firm:
Masao Okabe (10 outside)